Drying-oven with automatic feed and delivery.



,No.- s4a,s84. Patented may l, |900.

` H. n. nAvls. DBYINE DVEII WITI'I AUTOMATIC FEED AND DELIVERY.

(Application med .my 21, 1899.)

no. 648,684. 'Patented may l, |900.

. H. n. nAvls. DRYING UVEN WITH AUTOMATIC FEED AND DELIVERY.

(Application led July 21, 1899.) (No Nudel.) 4 Sheets-Sheet 2.

Why/55555 No. 648,684. Patented May I, |900. I H. D. DAVIS. Y DBYING OVEN WITH AUTUIIATIC FEYE'D AND DELIVERY.

(Application med July 21, 1899.)

(Ilo Model.)

' 4 sheets-sneer 3,

l Inlumlulu Il uw,

No. 648,684. Patented May I, |90 0.

pplicaticn led July 21, 1899.)

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A u *Y* Y closed in a kiln or oven.

UNITED STATES PATENT OFFICE.

HENRY I). DAVIS, ornAs'rron'r, MAINE.

DRYINe-ovEN WITH AUTOMATIC FEED AND DELIVERY.

SPECIFICATION forming part of Letters Patent N o. 648,684, dated May 1, 1900.

Application filed July 21, 15899. Serial No. 724,724. (No model.)

To all whom v'.mcty concer-n,.-v

Be it known that I, HENRY D. DA'VIS,a citizen of the United States, residing at Eastport, in the county of Y Washington and State of Maine, have invented new and useful Improvements in an Automatic Feed for Baking- Ovens, of which the following is a specification.

The object'of .this invention is to provide an automatic feed for ovens for baking lacquered and printed tin, whereby a saving of time and expense may be attained.

In ovens as at present constructed the tin is placed on a rack and pushed into the oven on a turn-table. To do this, it is necessary to open a door to admit the rack and also to take the same out of the oven. This necessitates loss of time and also cools olf the oven. The present method-necessitates the employment of a man to load the racks and also one to unload the same. In my improved device the sheets are fed into and out of the oven automatically and without any loss of heat and time.

The capacity of myimproved ovenfor baking lacquered and printed tin is four times as great as that of the ovens above referred to,

in which the tin is placed on a 'rack and pushed into the oven on a turn-table.

The invention consists in a rotary wheel for carrying the tin sheets,.said wheel being in- The invention further consists in the automatic feeding mechanism for feeding the Vsheets of tin intov the oven upon the wheel and for removing the said sheets of tin from;` the wheel and oven.

Referring to the drawings, Figure l is asectional elevation of my improved oven and 'automatic feeding mechanism. Fig. 2 is a side elevation of the feeding-device with'the oven-walls 'insection and the air pump and. pipes removed. Fig. 3 is side elevation of a portion of the feed mechanism. Fig. 4 is a plan View of the same'. Fig. 5 is a detail 1ongitudinal sectiontaken on line 55, Fig. 1.

Figs. 6, 7, and 8 are diagram views illustrating the manner of feeding the tin sheets into and outof the oven. Fig. 9 is-a transverse section, line 9 9, Fig. 3. Fig. 10F is an enlarged detail of ia' portion of the plate-.removing-arm with the ngerpivoted thereon..

out the several views of the drawings.

In the drawings, 90 is a rectangular baking oven or kiln'. The fire is built on the gratebars l0 of the stove or furnace 11, and the gases and smoke pass out of the furnace through the smoke-pipe 12. Y

The sheets of printed and lacquered tin are taken one at a time and placed upon a table 48, supported upon arms 49 upon the side frames 21 and 38. Said table has two longitudinal slots V 50 therein', through which project iingers 5l 5l, fast to the sprocketchains 13 13, and said sprocket-chains are given a reciprocating motionby means of 'an eccentric 14, fast to a shaft 15, said shaftbeing rotated by a pulley 16. The eccentric 14 is connected by an eccentric-strap 17 andeccentric-rod 18 to a segmental gear-lever 19, pivoted at 2O to the side frame 21. The segmental gear-lever 19v meshes a pinion 22, fast to a shaft 23, which turns in a bearing 24 `,upon the adjustable slide 25. The slide 25 is dovetailed at 26.and slides on guide 27, fast to the frame 21, being adjusted longitudinally by the screw 28 and'clamped to the frame after being adjusted by the set-screws 29. A gear 30, fast to the shaft 23, meshes a pinion 31, fast to a shaft 32, which has a bearing 33 on the adjustable slide 25. A gear 34, fast to' shaft 32, meshes a pinion 35, fast to the shaft 36, which shaft 3,6 has bearings in the adjustable slide 25 on the side frame 21 and also in a similar slide 37, adjustable upon the sideframe 38, which is formed similar to the side frame 2l and conuecte'd thereto by stayrods39 and a brace 40, and said shaft 36 is supported midwaybetween the side frames 2l and 38 by a box`41, adjustable upon the "brace 40. The shaft 36 has two sprocketwheels 42 42 fast thereto, imparting a reciprocating motion through thetrain of gearing hereinbefore described from the eccentric 14 tothe sprocket-chains 13 1.3, which pass from the sprocket wheels 42 to another pair of sprocket-wheels 43, fast to a shaft 44, which turns in bearings 46 upon the bracket 47, fast to the inner face of one side of the oven 90. It will be seen that each sheet of tin 52 as it is placedupon the table 4S will be carried forward bythe fingers 51. upon the sprocketchains 13 and through the opening 53 in the roo = ov are arm er.

' 745 rowin then draw the enger es side of the oven 90. The sheetsof -tin lare carried by the sprocketchains 13 intothe oven 90 and laid one by one 611 shelves 54 on the rotary wheel 55. The wheel 55 as a whole 5 consists of two flanged wheels 56 5 6, both fast to a shaft 57, and the shaft 57 has vbearings at 58 in the'walls of the oven 90 and is rotated by a worm-gear 59, which meshes a Worm 60,

. said worn'i being rotated bysuitable mechan- I 1o ism, such as a pulley fast to the shaft 61, to

which said Worm' is also fastened. The wheels' 1.56 each have a flange G2, to which is bolted .the flanged ring 63, said ring having a series of shelves 54 thereon.. The shelves54 are- I5 made by stretching wires 64 from the ,cylindrical pins 65'to the diamond-shaped guide? pins 66, both thepins, 65 and 66 vbeing'fast to the ring 63. This construction of the shelves 54 makes a shelf which'touches Very little oli-f zo the tin sheet, leaving the surface of said sheet fully exposed to' the hot air. The diamond' shaped guide-pins G6 prevent the edge 4oi" the sheet as itis being fed into or out of lthe oven from catching 'on said pins, more especiallyl 25 in the case of sheets having .Warped oriiurnedup edges..

The 'sheets of tin whenpnshedento'.-the

y' shelves 54 are-.prevented-from 'being moved -j too far toward 'the center ofthe `wheel 55 -3o through momentum bythe guard-wires8383,

" which extend in a circle around thewheel the inner-end of said/shelves.

toward -the center of the/wheel'. The spring againstthe stop .71, and upon itsjretnrn movement the out` ofthe wheel,-F ig. Z, through theeopening 72, Fig. 8, and into'the conveyerschan 73,?

5o which consists of a series 'of shelves 74,- fast to apair of sprocket-chains which pass around sprocketwheels 75 and are so timedwith relation to the-,wheel 55 that as the tinsheets are drawn out ofthe oven, as hereinbefore.` '5' 5 described, theyaredeposited one by one upon thelchain conveyer-YS and thence4 carried :awayto any desired distance. f

Beneath the wheel 56 are a pair' of seni'icysaid perforations 78, up through' the wheel 55', n

and around all the tin plates carried thereon and out throughthe pipe 79being forced by the blower S0 through the pipe 81, through the oven 90,.and pipe 79 over and over again, thus' continually utilizing the heated air.

The operation of the dev-ice as awhole is as follews: The sheets of lacquered and' printed tin` 52'are placed upon the'table 48 one by one and are carried forward by thefingers 51 upon the sprocket-chains 13 through the opening "53 into the oven'90 and laidupon the shelves 54011 the wheel 55', and the Wheel 55,

slowly rotating, carries said'tin plates around thro-ugh the heated air .in the oven 90-until saidsheets are drawn' 0E the shelves54-ont through the opening 72'and onto the conveyer-chai-n 73 by thehook-arln G7 and springlfinger 68, andv thence the tin plates are carried. by Said couvcyer-chain to any-` desired locality.

vHavingthus described my invention, whatv 'I claim, and desire to secure by Letters Pata Y 1.' A baking'oven, a rotatory wheel inclosod within saidove-n and lneanjs for' rotating said Wheel; .in combinationgwithf sprocket-chains et-wlieels4g, 43, and mechanism. for. impart'- ing :a .reciprocating motio to said sprocket-J chains.

2. A-bak1ig-'oven, a'rotatorg;7 wheel iii-closed withinsaidovem and means for rot-ating said wheel, in combination withsprocket-chains.

1 3, .having an arm 6.7'attafched thereto, sprocket-wheels 42, 4 3, and mechanism forifmp'ari'fv -I "j i' ing a reciprocating motion tofsaid. sprockete." A baking-tme1intanoryfwileeinilused refe` within said oven', and means 'foi-'rotating said .l '-.-.;f wheeL -ir i. ;combination :wiithj'one'f ori more spiketchiallhavineffingersland an arm 67v attached thereto,"sprocket-wheels y42,

tatorylwheel, 'hav-ingle. series of vshelves eic-` tending radially from the periphery ofl said' wheelftoward'- the center thereof, eachffs'helf 4a'and mechanism forrotatingfsaid sprocket1 iw being divided into two parts by aspace-'exvtendin g f romLthe periphery'toward the cen-ter essere wheel, in combinaannwah sprocket.- chains 13 having lingers 51 attached, thereto,

I 20 l imparting fa 'reciproeatingfm'otion' to' vsaid .sprocket-wheels1'42, 43, 'and mechanism for sprocketechains. 1 e '5..-.\`ln con1binationwithran oven for baking sheets of decorated metah'a rotary wheel hav- -ving afseries of lshelves'. extendingV radially, from the .peripheryosaid wheeltoward the center thereof, each 'shelf beingdivided into two parts by a space extending from the periphery toward the center of'saidwheel, said shelves vconsisting of diamond-shaped guidepins'66, connected by support-wires 64 to pins 6 5, said pins 66 and 65 being fast to rings 63, v`

l lindric'al flanges 76, fast to the side of the 6o. oven 90,'which prevent the-sheets of .tinfrom dropping ont of .the wheel'55 as the latter rei* vulves. A plate 77,v perforated at 78' 78, shields the.' tin lplates np'on the wheel 55 from the direct. 6 5 radiation of heat from the furnace 11, but. allowsza currentofV heated air to pass through on the wheel 55, and parallel to the axis thereof, substantially as described for the purpose specified. s

6. .In'combination with an oven for baking sheets of decorated metal, a rotary wheel havinga series of shelves extending radially from the periphery of said Wheel toward the center thereof, a guard-Wire extending around the Wheel in .a circle vat the innerV ends of said shelves, each shelf being divided into two parts by a space extending from the periphery toward the center of said Wheel; said shelves consisting of diamond-shaped guidepins 66 connected by supportwires64 to pins 65, said pins 66 and 65, being fast t'o rings 63, on the Wheel 55, and parallel to the axis thereof, substantially as described for the purpose specified. x

7. A baking-oven, a rotatory wheel inclosed within said oven and means for rotating said wheel, in combination with sprocket-chains 13, having an arm 67 attached thereto', said arm having a spring-linger 68 pivoted thereon, sprocket-wheels 42, 43, and mechanism for rotating said sprocket-wheels so as to move nger 68 pivoted thereto, mechanism iorimparting a reciprocating motion to said arm,`

and 'removing' said sheets of decorated metal chains 13, having an arm 67 attached thereto,

sprocket-Wheels 42, 43, and mechanism for imparting a reciprocating motion to said sprocket-chains.v

10. In combination with a bakingoven,a

rotary wheel, having aseriesof shelves extending radially from the periphery of Said wheel toward the center thereof, each shelfy being divided into two parts by a space extending from the periphery toward-the center of said Wheel,'in combination with one or more sprocket-chains 13 having fingers 5l and I an arm 67 attached thereto,sprocket-wheels 42, 43, and. mechanism for rotating said sprocket-wheels. l

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

l HENRY D.- DAVIS. Witnesses: A

CHARLES S. GoonING, WM. H. VARNUM. 

